Fuel cell

A fuel cell is provided that includes an anode, a cathode, a solid electrolyte layer, a barrier layer, and an buffer layer. The solid electrolyte layer includes zirconium and is provided between the anode and the cathode. The barrier layer includes cerium and is provided between the solid electrolyte layer and the cathode. The barrier layer has pores. The buffer layer includes zirconium and cerium and is provided between the barrier layer and the solid electrolyte layer. The barrier layer has a first barrier layer provided near to the buffer layer with a first pore ratio and a second barrier layer provided between the first barrier layer and the cathode with a second pore ratio. The first pore ratio of the first barrier layer is larger than the second pore ratio of the second barrier layer.